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diff --git a/147/CH4/EX4.15/Example4_15.sce b/147/CH4/EX4.15/Example4_15.sce
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+close();
+clear;
+clc;
+//resistance 'R', capacitance 'C, maximum voltage 'Vm', source frequency 'w'
+R = 1; //ohm
+C = 1000 * 10^(-6); //F
+Vm = 10; //V
+w = 1000; //s^(-1)
+//impedance 'Z'
+Z = sqrt(R^2 + (1/(w*C))^2);
+//phase difference in radian 'rad'
+rad = atan(-1/(w*R*C));
+//phase difference in theta 'theta'
+theta = rad*180/%pi;
+A = -Vm*sin(rad)/(w*R*C*Z);
+//time constant 't'
+t = 1/(R*C);
+mprintf("i(t) = %d e^(-%d)t + %0.2f cos(%d t -( %d))",round(A), t, A*Z, t, theta);